Salve a tutti ho trovato un codice su technet di microsoft x scaricare un file ma il problema è che quando scarico questo file txt al fondo mi appaiono righe con il codice html della pagina di download. Qualcuno sa dirmi come risolvere il problema?
Il codice è

Dim iStream As System.IO.Stream

' Buffer to read 10K bytes in chunk:
Dim buffer(10000) As Byte

' Length of the file:
Dim length As Integer

' Total bytes to read:
Dim dataToRead As Long

' Identify the file to download including its path.
Dim filepath As String = "DownloadFileName"

' Identify the file name.
Dim filename As String = System.IO.Path.GetFileName(pathwritefile.Item(0).Item(3) & nomefile)

Try
' Open the file.
iStream = New System.IO.FileStream(pathwritefile.Item(0).Item(3) & nomefile, System.IO.FileMode.Open)

' Total bytes to read:
dataToRead = iStream.Length

Response.ClearHeaders()
Response.ContentType = "application/octet-stream"
Response.AddHeader("Content-Disposition", "attachment; filename=" & filename)

' Read the bytes.
While dataToRead > 0
' Verify that the client is connected.
If Response.IsClientConnected Then
' Read the data in buffer
length = iStream.Read(buffer, 0, 10000)

' Write the data to the current output stream.
Response.OutputStream.Write(buffer, 0, length)

' Flush the data to the HTML output.
Response.Flush()

ReDim buffer(10000) ' Clear the buffer
dataToRead = dataToRead - length
End If
End While

Grazie

grazie e ora tutto ok